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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20d3a7b0788fb46adc1cd639b6d5e8adc863f141ba0f910df979fbf261cd0d1e' 
  AND token = 'Crgpprpy9T+hzc2YmWf+o3/qYe4prqr/6FNdy2YKHL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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