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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f7a2e03c0a1dc5eb4e3dfcf9a8f177a0a9896b77f0922f43d2047347bb0aa7c' 
  AND token = 'k/HPOlhw8rN0fexYAVxERWCVrpKHsbP5m1FjuctfKGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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