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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cc766c6e7b61603e5d9bd4decf386d5786b84ffba4e573324a5a4a9d3e79334' 
  AND token = '45nfaJCTTruCbYnYlHfyfdchwPYUEyyfqg0+vUvJtsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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