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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58687648b2f05a4b8f129b615639a15db2a7eeb03297f2d75f40175883f1bde3' 
  AND token = 'VN6XPTWzdEDCW7vO82jfy7Eu0yVZadDf/V1GZbPb+os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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