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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7225756827a4fee39caed368a84267857cc2ddc4a8c2b57931a10e9f5f67d993' 
  AND token = 'GySOiZYNeVlhPpUorbxlj1UgX3dEI3U0D2ZccBTFL6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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