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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e7e32064ba456c5c62fa782c4f259925ad291d960020ed4f65f0a791fa440096' 
  AND token = 'a+fPAf0+49XEXaSJWSVgIZWdcrEBrFKB8uWZ0iRRrjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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