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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8985ba82660be8d41e8398faf34d487fafcf1ce9d4f26326989a0267857eab4a' 
  AND token = 'JA0nCF2zDKJpdQZwaJRYF2uc7CF0Vd53lLDeqAJA9ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00100

JSON explain

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