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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be8965d84f0d53e367a7547ebddfbcc492b562327ccaa56da6e8f57161d34f32' 
  AND token = 'V4eyU3rN7rahzOk8VYleL10okJx7O9xQ3WEWvOios3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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