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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41c3a7182b54b99d0fcb2525ba56b01be34d311145d374792b00864cda05e2b1' 
  AND token = 'ND7AeBmZfssoQ7jv2swwEC+pD2W4iJ/l1A8YRJP3d+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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