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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '077b13da77451d3bb60088a993a223bad99d16dbcab4968885ff9b0ebd449ee4' 
  AND token = 'MFYCPWmGMOCqNa21CmP7TE+u/L+7RHnlXHmeyz5FCuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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