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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7032fbb464ca50444be340f3aaf6b91f242d5b671cb54b507e56a0b83eb70765' 
  AND token = 'ixdA8Lj02iAqQeIxpUPW/iKoAf5FKQGzegx9QoQ2FSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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