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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c93bc9cb7e107ac35065ec10b7df1ed21d4ab320d17863037cd5a14fa465753' 
  AND token = 'L9+Lw3k+irdUkj4pK6l0adInX0mW3Sbnqzh1XJwAB0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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