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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '167f3080cedb999cc397e22bacf21d321cddce34e1a0befd7c66734956f27307' 
  AND token = 'BvncWj9+/aOGd65hshx68gDI9lmzAA28gBMG+EpD27c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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