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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0dda974f910972d33f6734f131d32f493a313d2f8008888f8d1899dc9f4e777b' 
  AND token = 'eA2bLFGYLJoaBzhcCmFa6ZHIaEuL/3Ck4ZkAk7WwCVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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