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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60a131c7bc9981cc32c4cca3cf8df0ed4e6c6bac889389c237a9dd51f5e7d970' 
  AND token = 'dmf4J40ue2/9mg9hILuvSEsViGrqmIqxZFfAo484DJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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