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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06f0cc61c4f7ea477a0a97cd3c1094ddbae9f26c64d53960fe1a437cdce0baae' 
  AND token = 'oHM55ST54nwzymQXUIp8UA4klIepJiJ+1sP9I6UyoWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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