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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f582cac078d21a3b4b33cae8d0b5d3b93548ae8fb9f0a32ab5f9b049cac21a0a' 
  AND token = 'vrug6l5kNEyGjRFwCyDM2w96nwJ1/GgpnzrZ8RP8NqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}