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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a7815cbc502556c56abf580af4bf5e7e29762e5abac263272e811493bb8a0e6' 
  AND token = 'SOVvkYSp3s/FyYprZEnZJsimjOckbtJ8R/hPVx13h+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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