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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e0499dd9d3d40fe75fcf713d48bee9eca4c77da2dadd4d2b3d8f2519c3e24fd' 
  AND token = 'GQoHhxALSJy4TEZYWz0iiZWPpv4Os612+M78FJGgsUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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