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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed146deb4b1f26a2d722201bc9df3b878c9ab6867f6bfb7b9f41a44f1dc3e85c' 
  AND token = '5TuZfvayawBgrtMVR4eLSi3mMHxY5eoh9foXChnc9M8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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