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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b02a47e57664a9ba9c8c41f7f62fe356c2b54221b44ed82fb6a801e698b6c0d1' 
  AND token = 'ct+q6csGGGLfR0Noy+x+3kTpIBSljJsTLGn3SxNqNJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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