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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01447962c2d0d5dcac5f2b70d470057a3cbe5233e987424c6b30dddca822de0c' 
  AND token = 'O5nZQYKsM7GJKIQTmbp3NMfFudBTnXloY1cGnJWeedo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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