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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c0285a9cd86d033355f076ae5ba8c40758ef1783e3b1dc3629e11939b9d786b' 
  AND token = 'vCg5e4vcUwrvrLdEWiJupP/2UDTxiDxqJAKEdjTKpuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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