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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8d27b03aca24f20c43e9835e0b3dc657889d2b70bc0b1acb2f2c2a15e4ede04' 
  AND token = '9DOwE4Bbs5I+7RsJADIp3nzEHS+6MISlul9xdU6Khnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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