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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8132e8f0fbf50f22ee58dbbc881a58300dd8bac06a3fac3da97e01fe93fa1143' 
  AND token = 'rOoiyro7z76ETbqzsemCVw9VuY/LPZ3RZJj8csUJNwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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