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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3026ed65229fe11dad4cbb12c9a7325451fb99c70105c0c89118bbdb0fcd0a5a' 
  AND token = 'XQB56XTNjWJaM1HzH6HeDkNQo/fLMilD+573Em6fTiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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