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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1986761061b3483eb686a1838341ac1a9c066b3fc149e716aa618b1c6a54a0e' 
  AND token = 'ToB13gvFNDPw9cfdio/2LBozTa9vB/a8ckDBiumqSWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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