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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '544b3034741844afc0f08e771acd01eb89d05c8e135847dac67718319aef9e53' 
  AND token = 'ZeBcrjqEAz0LKxhieUL638gTb8DbAHRyqx9UvLJEGEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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