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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09d105f233097350e74a75fc30f7144048cd01163e5551321d568a504b0af931' 
  AND token = 'GkWFQbJJWb8U7I7Dg8FBMp3wm30BjF+trsZSC3ib6EI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00216

JSON explain

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