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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc1d4aaf722d0b17a7893e9d516c18e8bbcb654c861c1a1e2118f0df0bd230ea' 
  AND token = 'tT3h5SnlKjv/iTXr/enNMTLhVaFLYgnsGGeEMDvlw/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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