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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '890dc0e54985bc6e8f71992defbc89e1e916729b55503bd1f0669bb639283fe5' 
  AND token = 'DGUsUP7pO++UF8A4RsjxlLwtO64ZR2DaUNCDn/ow/AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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